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Description: Six commercial free-stall dairy barns were monitored for air quality during the winter of1983-1984. A comparison of air quality was made between units with slatted and scraped passageways by measuring C02, NH3, H2S and dust parameters. The mean C02 production rate for all six barns was 290L/(h-cow(500-kg)). The 48-h mean C02 concentrations ranged from 1730 to3550 ppm and the maximum hourly mean concentration was 5750 ppm. The mean rate of ammonia production was 39% higher in units with solid passageways than in the three units with slatted passageways. The NH3 production rates in the six barns ranged from 1.7 to4.4L/(h-cow(500-kg)). The 48-h mean NH3 concentrations in the six barns ranged from 7 to 20 ppm, with hourly means reaching 54ppm. All recorded H2S and dust concentrations were low.

Keywords: air quality in six alberta commercial free-stall dairy barns
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Citation: Clark, P. C. and J. B. McQuitty 1987. AIR QUALITY IN SIX Alberta COMMERCIAL FREE-STALL DAIRY BARNS. Canadian Agricultural Engineering 29(1):77-80.
Volume: 29
Issue: 1
Pages 77 - 80
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Date: 1987
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Coverage: Canada
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